Page 19
of
68
INDUSTRIAL PUMPS
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Chapter 2 - Introductory Information
Translation of original instructions - S
CUBIC -
S
BOXER
rev
. 2021
2.5.3
TEMPERATURE CLASSES FOR PUMPS TO BE
INSTALLED IN AN EXPLOSIVE ENVIRONMENT (
Zone
1 and Zone
M2):
The temperature class corresponding to the protection against the risk of explosion of the pumps designed
for use in Zone M2 with the presence of explosive atmospheres is T150°C.
The temperature class corresponding to the protection against the risk of explosion of the pumps designed
for use in Zone 1 with the presence of explosive atmospheres is T135°C (T4); all the data for calculating
the maximum fluid temperature under the operating conditions are shown below.
NOTE
The equipment’s maximum temperature has been determined with no powder deposits on the external
and internal surfaces.
Definition of the Calculation Data (Zone 1):
T4
= ATEX temperature class 135°C;
Ta
= maximum ambient temperature 40°C;
Tl
= maximum temperature for dry use of the pump in the workplace (50°C);
Δs
= safety factor (5°C);
Tx
= calculation factor (Tl + Δs) only for Zone 1;
Tf
= maximum allowed fluid processing temperature.
CAUTION
In consideration of the admitted ambient temperature variation range in Zone 1 and Zone M2, fluid service
temperature values higher than those indicated above will not permit compliance with the corresponding
temperature classes, respectively T4 (135°C) and 150°C, besides causing damage to the pump.
Where the user presumes that the temperature limits set forth on the product marking and in this
manual may be exceeded, a detection and protective device must be installed on the system to
prevent the maximum allowed temperature from being reached.
NOTE
The user must consider the ratio between the pump’s maximum surface temperature indicated on the
marking and the minimum ignition temperature of the layers and clouds of powder.
2.5.4
IMPROPER USES
Any use of an S
CUBIC and
S
BOXER
pump other than that previously
described and specified in
Section 2.7
TECHNICAL FEATURES
, is to be considered improper and is therefore forbidden by DEBEM.
In particular, it is FORBIDDEN to use SCUBIC and SBOXER pumps for:
•
production of vacuum;
•
operation as a shut-off valve, as a check valve (non-return valve) or as a metering valve;
• pump operation for pumping powders of all types and kinds (flammable and non);
• operation with fluids that are chemically incompatible with the materials of construction;
• use with suspended products with a specific weight greater than that of the liquid (e.g. water
with
sand) or with solid particles larger than that indicated for each Model;
•
operation with air pressures, process temperatures and/or functional characteristics that are incompatible
with
the Technical Data of the pump and/or the Certification marking affixed;
• pump operation in potentially explosive environments that are not classified and/or compatible with
the pump’s type
of execution (see Certification marking affixed and Declaration of Conformity).
•
unsuitable pump use (incorrect choice of materials and installations) to operate in the presence of stress
corrosion cracking phenomena;
• operation with alimentary or pharmaceutical fluids.
CAUTION
The risks associated with use of the pumps under the exact conditions set forth in the Manufacturer’s
use and maintenance manual have been analysed, whilst the analysis of the risks associated with the
interface with other system components must be carried out by the installer/user.
Use of the pump that does not comply with the Manufacturer’s Original Instructions is prohibited
and invalidates the Warranty, the safety and explosion protection requirements.